Polarization sensitive elements fabricated by femtosecond laser nanostructuring of glass [Invited]

Beresna, Martynas; Gecevičius, Mindaugas; Kazansky, Peter G.

doi:10.1364/ome.1.000783

Cited by 205 publications

(127 citation statements)

References 61 publications

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“…The pulse duration was monitored with a single-shot autocorrelator. The pulse duration was chosen to match the optimum conditions for the fabrication of spatially variant wave-plates and polarization mode converters [12].…”

Section: Experimental Set-up and Methodsmentioning

confidence: 99%

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Femtosecond versus picosecond laser machining of nano-gratings and micro-channels in silica glass

Corbari¹,

Champion²,

Gecevičius³

et al. 2013

Opt. Express

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Section: Experimental Set-up and Methodsmentioning

confidence: 99%

“…Nanogratings are thought to favor the etchant penetration [11]. They are also associated with form-birefringence that is exploited for the realization of spatially variant phase plates [12].…”

Section: Introductionmentioning

confidence: 99%

Femtosecond versus picosecond laser machining of nano-gratings and micro-channels in silica glass

Corbari¹,

Champion²,

Gecevičius³

et al. 2013

Opt. Express

Self Cite

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“…The local optical axis directions (fast and slow axes) are perpendicular and parallel to the grooves, respectively. 43 Because the characteristic dimension of the structure is much smaller than the operational wavelength, the fabricated metamaterial can be regarded as a birefringent waveplate with homogeneous phase retardation and a locally varying optical axis direction. The phase retardation is y52p(n e -n o )h/l, where h is the writing depth and n e -n o is the induced birefringence.…”

Section: Fabrication Of the Metamaterials Samplementioning

confidence: 99%

“…The phase retardation is y52p(n e -n o )h/l, where h is the writing depth and n e -n o is the induced birefringence. As a linear approximation, the effective ordinary and extraordinary refractive indices can be written as 43 n o~ffi ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi ffi…”

Section: Fabrication Of the Metamaterials Samplementioning

confidence: 99%

Giant photonic spin Hall effect in momentum space in a structured metamaterial with spatially varying birefringence

et al. 2015

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The photonic spin Hall effect (SHE) in the reflection and refraction at an interface is very weak because of the weak spin-orbit interaction. Here, we report the observation of a giant photonic SHE in a dielectric-based metamaterial. The metamaterial is structured to create a coordinate-dependent, geometric Pancharatnam-Berry phase that results in an SHE with a spin-dependent splitting in momentum space. It is unlike the SHE that occurs in real space in the reflection and refraction at an interface, which results from the momentum-dependent gradient of the geometric Rytov-Vladimirskii-Berry phase. We theorize a unified description of the photonic SHE based on the two types of geometric phase gradient, and we experimentally measure the giant spin-dependent shift of the beam centroid produced by the metamaterial at a visible wavelength. Our results suggest that the structured metamaterial offers a potential method of manipulating spin-polarized photons and the orbital angular momentum of light and thus enables applications in spin-controlled nanophotonics. Keywords: geometric phase; metamaterial; photonic spin Hall effect INTRODUCTION Metamaterials or metasurfaces are artificial materials that are engineered to produce nearly any imaginable optical properties that are not found in nature. 1,2 They are typically structured at the subwavelength scale with ultrathin metallic or dielectric micro/nanoparticles or with holes opened in metallic films. Metamaterials exhibit unprecedented degrees of freedom in the polarization and phase manipulation of light via the geometric structuring of their structural units, especially on the wavelength scale, 3-9 which leads to applications such as vortex beam generators, 3,7 metalenses 10,11 and optical holography. 12,13 These materials also offer considerable potential for the manipulation of the angular moment of light and the photonic spin Hall effect (SHE), thereby providing convenient opportunities for spin-polarized photonics and nanophotonics. [14][15][16][17] The photonic SHE describes the mutual influence of the photon spin (polarization) and the trajectory (orbital angular momentum) of light-beam propagation, i.e., the spin-orbit interaction (SOI), which results in two types of geometric phases: the Rytov-VladimirskiiBerry (RVB) phase and the Pancharatnam-Berry (PB) phase. [18][19][20][21][22] The RVB phase is associated with the evolution of the propagation direction of light. When a light beam reflects/refracts at a planar interface between different media, a SOI occurs, and the corresponding momentum-dependent RVB phase leads to a spin-dependent real-

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“…With the increasing maturity of femtosecond laser technology it has become feasible to use lasers as tools for modifying bulk transparent media in useful ways, for example -by creating optical elements that may even not be realizable in other ways [1].…”

Section: Introductionmentioning

confidence: 99%

Bragg diffraction gratings formed in bulk fused silica by femtosecond Bessel beams

Mikutis

Kudrius

Paipulas

et al. 2013

MATEC Web of Conferences

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show abstract

Polarization sensitive elements fabricated by femtosecond laser nanostructuring of glass [Invited]

Cited by 205 publications

References 61 publications

Femtosecond versus picosecond laser machining of nano-gratings and micro-channels in silica glass

Femtosecond versus picosecond laser machining of nano-gratings and micro-channels in silica glass

Giant photonic spin Hall effect in momentum space in a structured metamaterial with spatially varying birefringence

Bragg diffraction gratings formed in bulk fused silica by femtosecond Bessel beams

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